Coil winding form



May 7, 1946. J. GARTNER coin WINDING FORM Filed April 17 1944 Jb/uz. Garilzer IN V EN TOR.

A TI'ORNEY Patented May 7, 194 6 COIL WINDING FORM John Gartner, Hasbrouek Heights, N. J., asslgnor to. Bendix Aviation Corporation, 'leterboro, N. J., a corporation of Delaware Application April 17, 1944, Serial No. 531,518

8 Claims.

This invention relates to winding forms such asare commonly employed for the purpose of winding coils into a desired shape prior to assembling in the slots of an armature core.

The specifications of many electrical machines require the use of a very fine wire for the coil windings, such a wire is quite limp and has shapesustaining properties to only a very small degree. Inasmuch as these coils must be formed into a predetermined shape, so as to fit the slots of the part .cular armature for which theyare intended,

'it is highly important that the shape be maineral turns of the Wire. While the form itself has the shape intended for the finished coil, it is necessary that the multiple turns of wire be tied together at suitable places, so that the coil will retain its shape after removal from the form.

These forms are ordinarily disassembled to remove a wound coil which operation has somewhat complicated the speedy production of the wound coils. Moreover, the forms now used do not readily lend themselves to having the insulation applied while on the form, and it has been necessary to carry out this. operation after removal of the coil from the form.

With these and other unsatisfactory conditions attending the use of the now available forms in mind, this invention has in view as an important object the provision of a coil winding form of the character aforesaid, which is characterized as being readily collapsible rather than sectional in formation, so as to facilitate removal of coils that have been found thereon.

In achieving this end, a plurality of posts are fixedly mounted on a supporting panel in proper position to define the shape of the coil desired. One of these posts is mounted for movement relative to the other posts, and when so moved has the efiect of collapsing the form so that the coil may be removed.

noted, in which one of the posts is carried by a member that is pivoted on an axis eccentric to the axis of the post. Thus, rotation of thi memher causes the effective position of the post to I vary as, the occasion demands.

A more detailed object is the provision of yieldable means for holding this movable post in its extended or form-defining position.

Yet a further object of the invention is the provision of a coil winding form of the character aforesaid in which each of the posts is provided with an annular groove or channel which receives the windings. If desired, a strip of insulating material of a type now commonly used in this art, may be positioned about these posts in a condition in which the strip conforms to the shape of the annular grooves. Thus. the strip acquires a channel shaped cross section which is readily adapted to receive the turns of the wire.

After the winding operation has been completed, the strip may be folded over the coiled wire, and due to its adhesive properties will remain in this encaslng position.

A further object of the invention is the provision of a coil winding form of the type indicated, which includes means that provides for the tying in of the lead wires at proper points.

Various other more detailed objects and advantages of the invention will in part becomes apparent, and in part be hereinafter stated as the description of the invention proceeds.

For a full and more complete understanding of the invention, reference may be had to the following description and accompanying drawing wherein:

Fig. l is a perspective of a coil winding form made in accordance with the precepts of this invention;

Fig. 2 is a top view partly in elevation and partly in section, this view being taken about on the planes represented by the line 2-2 of Fig. 1;

and

Fig. 3 is a view taken as a section about on the erence characters'denote corresponding parts, a

coil winding form, made in accordance with this invention, is shown as comprising a main body or supporting panel It. This' panel It! may be made from any suitable material that is available andtakes the form clearly illustrated in Fig. 1. This form is characterized by the curved side edges H and 52 which are joined at the top by a concave top edge surface it and at the bottom by a substantially straight edge it.

Extending from the so-called inner face of the main body panel it is a hub portion it: that is in- 55 tegral with the panel to. An opening it extends the form to be wound,

. a corner which carries a fixed post 2|. Post 2| is mounted on the panel It by a connection comprising an opening 22 that is formed in the panel In. Extending through this opening 22 is a shank 23 that is of reduced diameter as compared to the post 2|, thus providing an annular abutment shoulder 24 that engages the outer face an L-shaped bracket 48 having a foot 58, which of the panel Hi. The free end of the shank 23 I is threaded, as indicated at 25, and screwed thereonto is a nut 26. It is evident that the panel I0 is tightly clamped between the shoulder 24 and nut 26.

Adjacent to its outer or free end, the post 2| is formed with an annular channel or groove 21 that is substantially U-shaped in cross section, as illustrated.

Carried in the corner between the curved side II and concave top edge I3 is another post 28, which in all respects is similar to the post 2|. This post is mounted on the panel III in the manner above described in connection with post 2|. Another post 29 is mounted on the panel l8 adjacent to the comer defined by side l2 and straight bottom I 4.

Approximate to the corner of the curved side II and bottom l4, the panel i6 is provided with an opening 30, which receives a stub shaft 3| formed on a. plate 32. This plate 32 is rotatable on the axis of the shaft 3|. The plate 32 engages the outer face of the panel l8, while a washer 33 is interposed between the head at of a screw as and the inner face of the panel.

In close proximity to the opening 38, the panel I0 is formed with another opening 36, which is partially closed on its outer face bylip 31. A ball detent 38 is positioned in the recess 36 and urged against the lip 31 by an expansion spring 39. A screw plug 40 closes the opening 36 on the inner face of the panel l5 and serves as a backing for the spring 39. The plate 32 is formed with a spherical recess 4|, in which the ball detent 38 is adapted to fit to yieldably maintain the plate 32 in a desired position.

Extending outwardly from the plate 32 is a post 42, the axis of which is eccentric or offset with respect to the stub shaft 3|. Adjacent to its outer or free end, the shaft 42 is formed with an annular channel 43 which corresponds to the channel 21 of the other posts. Extending radially outwardly from the post 42 is an operating "member in the form of a handle 44, which may be availed of to rotate the plate 32 about its axis as occasion demands.

Carried by one side of the hub i5 is a leaf spring member 45 which may be secured thereto as by screw fastener shown at 46. This spring 45 serves as a guide for the wire which is fed to as will be later pointed out.

The upper surface of the hub l5 carries a pair of anchoring-pins 41 and 46 which are inclined with the angles of inclination diverging. Thus, the pin is tiltedin one direction and the pin 46 in the other.

Mounted on the outer face of the panel In is is secured to the panel III as by screws 5|. The bracket 49 carries a plurality of pointed pins 52, 53, 54, 55 and 56. It will be noted that the central pin 541s longer than the pins 53 and 55 on either side thereof and which in turn are longer than the end pins 52 and 56.

The'lead wires which are to be tied into the coil that is wound about the post 2|, is properly positioned by the anchoring pins 41 and 48 at one end, and by pointed pins 52 to 56, inclusive, at the other. This, in effect, provides for the tying in of four lead wires.

While a coil may be formed by simply leading the wire from which it is made in under the spring clip 45, and thence to the channels 21 and 43 of the posts 2|, 26, 28 and 42, and rotating the panel It by driving the shaft I8, the invention has particularly in view inclusion of a preliminary step. This step involves the positioning of an insulation strip 51 about the post prior to the winding operation.

Insulation strips of this type are well known in this art and may comprise a suitable fabric backing that is treated on one face with an adhesive. The outer or non-adhesive surface of the strip 51 engages the posts, while the inner adhesive surface is adapted to receive the turns of the wire which are shown at 58. Thus, when the strip 51 is first'positioned it assumes a channel formation as determined by the shape of the annular grooves 21 and 43.

After the panel ID has been rotated a desired' number of times to form the desired numbers of turns of the wire 58, the channel defined by the insulating strip 51 may be closed by bending over the free edges to complete the casing of insulation. The adhesive properties of the strip will cause this condition to be maintained.

The lead wires which are shown at 59 are turned over the pins 41, 48 and 50 to 54, inclusive, at the proper time to assume their proper position in the coil structure.

Upon initially placing the insulating strip on D in position. The pins 52, 53, 54, and 56 thus stick through the insulating strip and thereby tend to hold the same in position.

In the winding of the coil, one end of the wire is first fastened at the leaf spring 45, as shown in Figure 2, and then laced about the pin 52. From the pin 52 the wire is then wound in the insulation strip 51 about the several pegs for the required number of turns. The wire is wound, as

viewed in Figure 1, about the form as the form is turned in a clockwise direction.

At the end of the desired number of turns, the wire is laced about the pin 53, as shown in Figure 2, and about the pin 41. From the pin 41 the wire is laced about the pin 52 and is then wound about the several pegs for a second desired number of turns.

At the end of the second desired number of turns the wire is laced about the pin 55 and looped around the pin 48. The wire is then laced about the pin 54 and wound about the pegs for a third desired number of turns.

At the end of the third desired number of turns the wire isilaced about the pin 56 and the end fastened at the leaf spring 45.

Upon completion of the steps thus described the handle 44 may be actuated so as to vary the position of the peg 43. so as to permit the coil to be later removed from the pegs.

The insulating strip may then be removed from the impaling pins 52, 53, 54, 55, and 55 and the free edges turned over so as to complete the easing of insulation. As previously noted, the adhesive properties of the strip will cause this condition to be maintained.

In this latter operation the wires 1eading to the pins 41 and 4B and the leaf spring 45 will project from the insulation casing so as to provide convenient leads to the respective coils wound therein.

of posts outstanding from one face of said panel, each of said posts being formed with a groove adapted to receive the turns of a coil, means for mounting one of said posts on said panel so that it is movable relative to the other of said posts, a plurality of pins carried .by thepanel on the face from which said posts outstand, said pins being substantially parallel to said face, and a pair of anchoring pins carried by said panel at its opposite face and. adapted to cooperate with the first saidpins to serve as guides for the lead wires. 7

. 5. In a coil winding form, a panel having inner and outer surfaces, a hub part on said inner face and having a shaft receiving opening, means carried by said hub part for establishing a drive ing relation between the said panel, and a. shaft The completed coil encased in the insulation strip and with the desired leads projecting from the insulating casing may then be removed from the coil winding form.

While only one embodiment of the invention is hereinbefore set forth, it is to be clearly understood that the invention is not to be limited to the exact construction illustrated and described, because various modifications of these details may be provided in putting the invention into practice within the purview of the appended claims.

What is claimed is:

1. In a coil winding form, a panel, a plurality of posts outstanding from one face of said panel, each of said posts being formed with a groove adapted to receive the turns of a coil, means for mounting one of said posts on said panel so that it is movable relative to the other of said posts, and an impaling pin carried by said panel for iaaltening an insulating member thereto for said co 2. In a coil winding form, a panel, means for mounting said panel on a drive shaft, a plurality oi tOStS outstanding from one face of said panel an L fixedly mounted thereon, another post inc .mted for rotation on said panel on an axis that is eccentric to the axis of said post, each of said posts beingformed with a groove adapted to receive the turns of a coil to be wound, a bracket projecting from the one face of said panel, a plurality of pins projecting from said bracket for impaling an insulating member for said coil, and laid pins positioned in spaced relarelation whereby they are adapted to have lead wires which are to be tied into the coils wound on the form turned thereabout, and means carrled by the other lace of said panel for holding the ends of said lead wires.

4.Inaccllwindintorm,apancl.aplurallty tion whereby they are adapted to have lead wires received in said opening, a plurality of fixed posts outstanding from the outer face of said panel, each of said posts being formed with a Wire receiving groove adjacent its free end, a movable post mounted for rotation on said panel on an axis eccentric to the axis of the post, said movable post also being formed with a wire receiving groove, a detent for yieldably maintaining said movable post in an adjusted position, a pair of anchoring pins carriedby said hub, and a plurality of pins carried by said panel in spaced relation to said outer face and adapted to cooperate-with said anchoring pins in guiding lead wires which are to be tied into coils wound on said posts.

6. A coilwinding means, comprising, in combination, a rotatable element, supporting means carried by said rotatable element upon which said coil may be wound, impaling means for an insulating member for said coil, said impaling means carried by said element, and operable means for collapsing said supporting means for removal of said coil and insulating member upon completion of the winding operation.

7. A coil winding means, comprising, in combination, a rotatable element, a plurality of parts projecting from the element, a member carried by the parts for receiving the coil during the winding operation, means carried by said element for impaling said member, and means for mounting one of said parts in adjustable relation to the other of said parts, whereby said coil and coil receiving member may be removed from said parts upon completion of the winding operation.

8. A coil winding means, comprising, in combination, a rotatable element, a plurality of parts projecting from the element, a member carried by the parts for receiving the coil during the 

